Tankers Free CDL Practice Tests Page 2

Prepare For The Tankers Portion Of Your CDL Written Exams

Tankers Questions

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The dividers that split some liquid tanks into several smaller tanks are called:

Bulkheads

Splitters

Baffles

Dividers

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From The CDL Manual

Bulkheads:

Some liquid tanks are divided into several smaller tanks by bulkheads. When loading and unloading the
smaller tanks, the driver must pay attention to weight distribution. Do not put too much weight on the front or rear of
the vehicle.

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Bulkheads with holes in them designed control liquid surge are:

Biffles

Baffles

Perforations

Scrabbles

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From The CDL Manual

Baffled tanks:

Baffled liquid tanks have bulkheads in them with holes that let the liquid flow through. The baffles help
to control the forward and backward liquid surge. Side-to-side surge can still occur. This can cause a roll over.

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Baffled tanks are prohibited for transporting:

Food products

Heating oil

Gasoline

Sand

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From The CDL Manual

Unbaffled tanks:

Unbaffled liquid tankers (sometimes called “smooth bore” tanks) have nothing inside to slow down
the flow of the liquid. Therefore, forward-and-back surge is very strong. Unbaffled tanks are usually those that
transport food products (e.g., milk). (Sanitation regulations forbid the use of baffles because of the difficulty in cleaning
the inside of the tank.)

Be extremely cautious (slow and careful) in driving smooth bore tanks, especially when starting
and stopping.

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When should you load a liquid tank vehicle completely full?

You should never fully load a cargo tank

When carrying food products

Only on trips of less than 500 miles

Only when it's below 65 degrees outside

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From The CDL Manual

How Much to Load —

Never load a cargo tank totally full. Liquids expand as they warm and you must leave room
for the expanding liquid. This is called “outage.” Since different liquids expand by different amounts, they require
different amounts of outage. You must know the outage requirement when hauling liquids in bulk.

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The empty space in tanks that must be left to account for expansion is called:

Outage

Storage space

Clearance

Headroom

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From The CDL Manual

How Much to Load —

Never load a cargo tank totally full. Liquids expand as they warm and you must leave room
for the expanding liquid. This is called “outage.” Since different liquids expand by different amounts, they require
different amounts of outage. You must know the outage requirement when hauling liquids in bulk.

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The amount of liquid depends on all of the following except:

The liquid's weight

The legal weight limits

How much the liquid will expand

The viscosity of the liquid

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From The CDL Manual

A full tank of dense liquid (such as some acids) may exceed legal weight limits. For that reason, you often may only
partially fill tanks with heavy liquids. The amount of liquid to load into a tank depends on:

The amount the liquid will expand in transit.

The weight of the liquid.

Legal weight limits.

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Un-baffled tanks are also known as:

Smooth tank

Smooth bore

Clean bore

Hollow bore

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From The CDL Manual

8.2.5 – Un-baffled Tanks

Unbaffled liquid tankers (sometimes called "smooth bore" tanks) have nothing inside to slow down the flow of the liquid.
Therefore, forward-and-back surge is very strong. Unbaffled tanks are usually those that transport food products (e.g.,
milk). (Sanitation regulations forbid the use of baffles because of the difficulty in cleaning the inside of the tank.) Be extremely
cautious (slow and careful) in driving smooth bore tanks, especially when starting and stopping.

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Driving a tank vehicle on wet roads requires:

Double the normal stopping distance

Re-routing around towns

Special permits

A wet pavement endorsement

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From The CDL Manual

8.3.4 – Stopping Distance

Keep in mind how much space you need to stop your vehicle. Remember that wet roads double the normal stopping
distance. Empty tank vehicles may take longer to stop than full ones.

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How many baffles are found in a smooth bore tank?

4

5 or more

0

2

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From The CDL Manual

Unbaffled liquid tankers (sometimes called "smooth bore" tanks) have nothing inside to slow down the flow of the liquid. Therefore, forward-and-back surge is very strong.

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The amount of liquid to load into a tank does not depend upon:

Legal weight limits

The weight of the liquid

The amount the liquid will expand in transit

The pumping capacity of the rear pump

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From The CDL Manual

A full tank of dense liquid (such as some acids) may exceed legal weight limits. For that reason, you may often only partially fill tanks with heavy liquids. The amount of liquid to load into a tank depends on:

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